(19)

(11)

EP 3 909 290 A1

(12)

(43) Date of publication: 17.11.2021 Bulletin 2021/46 (21) Application number: 19831916.2 (22) Date of filing: 13.12.2019

(51) International Patent Classification (IPC):  H04W 28/24(2009.01) (52) Cooperative Patent Classification (CPC): H04W 28/24 (86) International application number: PCT/JP2019/048867 (87) International publication number: WO 2020/145031 (16.07.2020 Gazette 2020/29)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 09.01.2019 EP 19151053 (71) Applicant: NEC Corporation 108-8001 Tokyo (JP)	(72) Inventors: TAMURA, Toshiyuki Tokyo 108-8001 (JP) FAN, Linghang 69115 Heidelberg (DE) IANEV, Iskren 69115 Heidelberg (DE) (74) Representative: MacDougall, Alan John Shaw et al Mathys & Squire The Shard 32 London Bridge Street London SE1 9SG London SE1 9SG (GB)